1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
|
/* This software was written by Dirk Engling <erdgeist@erdgeist.org>
It is considered beerware. Prost. Skol. Cheers or whatever.
$id$ */
/* System */
#include <stdlib.h>
#include <string.h>
#include <pthread.h>
#include <sys/uio.h>
#include <unistd.h>
/* Libowfat */
#include "byte.h"
#include "io.h"
/* Opentracker */
#include "trackerlogic.h"
#include "ot_mutex.h"
/* Clean a single torrent
return 1 if torrent timed out
*/
int clean_single_torrent( ot_torrent *torrent ) {
ot_peerlist *peer_list = torrent->peer_list;
size_t peers_count = 0, seeds_count;
time_t timedout = (int)( NOW - peer_list->base );
int i;
#ifdef WANT_SYNC_BATCH
char *new_peers;
#endif
if( !timedout )
return 0;
/* Torrent has idled out */
if( timedout > OT_TORRENT_TIMEOUT )
return 1;
/* Nothing to be cleaned here? Test if torrent is worth keeping */
if( timedout > OT_POOLS_COUNT ) {
if( !peer_list->peer_count )
return peer_list->down_count ? 0 : 1;
timedout = OT_POOLS_COUNT;
}
/* Release vectors that have timed out */
for( i = OT_POOLS_COUNT - timedout; i < OT_POOLS_COUNT; ++i )
free( peer_list->peers[i].data);
/* Shift vectors back by the amount of pools that were shifted out */
memmove( peer_list->peers + timedout, peer_list->peers, sizeof( ot_vector ) * ( OT_POOLS_COUNT - timedout ) );
byte_zero( peer_list->peers, sizeof( ot_vector ) * timedout );
/* Shift back seed counts as well */
memmove( peer_list->seed_counts + timedout, peer_list->seed_counts, sizeof( size_t ) * ( OT_POOLS_COUNT - timedout ) );
byte_zero( peer_list->seed_counts, sizeof( size_t ) * timedout );
#ifdef WANT_SYNC_BATCH
/* Save the block modified within last OT_POOLS_TIMEOUT */
if( peer_list->peers[1].size &&
( new_peers = realloc( peer_list->changeset.data, sizeof( ot_peer ) * peer_list->peers[1].size ) ) )
{
memmove( new_peers, peer_list->peers[1].data, peer_list->peers[1].size );
peer_list->changeset.data = new_peers;
peer_list->changeset.size = sizeof( ot_peer ) * peer_list->peers[1].size;
} else {
free( peer_list->changeset.data );
memset( &peer_list->changeset, 0, sizeof( ot_vector ) );
}
#endif
peers_count = seeds_count = 0;
for( i = 0; i < OT_POOLS_COUNT; ++i ) {
peers_count += peer_list->peers[i].size;
seeds_count += peer_list->seed_counts[i];
}
peer_list->seed_count = seeds_count;
peer_list->peer_count = peers_count;
if( peers_count )
peer_list->base = NOW;
else {
/* When we got here, the last time that torrent
has been touched is OT_POOLS_COUNT units before */
peer_list->base = NOW - OT_POOLS_COUNT;
}
return 0;
}
static void clean_make() {
int bucket;
for( bucket = OT_BUCKET_COUNT - 1; bucket >= 0; --bucket ) {
ot_vector *torrents_list = mutex_bucket_lock( bucket );
size_t toffs;
for( toffs=0; toffs<torrents_list->size; ++toffs ) {
ot_torrent *torrent = ((ot_torrent*)(torrents_list->data)) + toffs;
if( clean_single_torrent( torrent ) ) {
vector_remove_torrent( torrents_list, torrent );
--toffs; continue;
}
}
mutex_bucket_unlock( bucket );
/* We want the cleanup to be spread about 2 Minutes to reduce load spikes
during cleanup. Sleeping around two minutes was chosen to allow enough
time for the actual work and fluctuations in timer. */
usleep( ( 2 * 60 * 1000000 ) / OT_BUCKET_COUNT );
}
}
/* Clean up all peers in current bucket, remove timedout pools and
torrents */
static void * clean_worker( void * args ) {
args = args;
while( 1 ) {
ot_tasktype tasktype = TASK_CLEAN;
ot_taskid taskid = mutex_workqueue_poptask( &tasktype );
clean_make( );
mutex_workqueue_pushsuccess( taskid );
}
return NULL;
}
void clean_all_torrents( ) {
mutex_workqueue_pushtask( 0, TASK_CLEAN );
}
static pthread_t thread_id;
void clean_init( void ) {
pthread_create( &thread_id, NULL, clean_worker, NULL );
}
void clean_deinit( void ) {
pthread_cancel( thread_id );
}
const char *g_version_clean_c = "$Source$: $Revision$\n";
|
